The tipping thing is complex. It has its pros and cons. For the most part, you do get much better customer service in the US.
The trouble with Australia is you don't get the same level of service and yet they ask for a tip.
To each their own, but my latest trip to the US I wasn't impressed with the service. Sure, where you're paying tips, the service is 'greater,' but often ingratiatingly so. And you pay a high dollar for the price - restaurant prices are similar base prices to here e.g. "$30" for a main, but then you have taxes and tips and conversion on top. You pay way more in just an older, or suburban restaurant than you do here.
Alternatively, where you don't pay a tip, the service is _shocking_. Seriously, bus drivers abusing people, telling customers to get back, shouting at them, retail workers ignoring you, forgetting about you, grunting, or one of the best, the supermarket cashier who was playing with her phone, we had to wait for her when we put our things on the belt, she said nothing at all the whole transaction, didn't look at us, waited for us to pay, then just put the change on the counter and turned right back to her phone.
Certainly, there is better and worse service here, but I've never experienced such bad service as in the US where people aren't tipped e.g. fast food, or the examples above. And as said, where you do tip, you pay a lot more for that 'service.' And I've also had really good service here, without tips, especially in high end boutiques, but even department stores e.g. Myer are still better.